導(dǎo)電媒質(zhì)包圍的球形空腔內(nèi)的圓環(huán)天線的特性
THE CHARACTERISTICS OF A CIRCULAR LOOP ANTENNA IN SPHERICAL CAVITY SURROUNDING BY CONDUCTIVE MEDIUM
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摘要: 本文導(dǎo)出了導(dǎo)電媒質(zhì)在被其包圍的球形空腔中的圓環(huán)天線內(nèi)產(chǎn)生的輸入阻抗的公式。描述了導(dǎo)電媒質(zhì)中天線輻射性能的定義。導(dǎo)出了圓環(huán)天線的輻射電阻公式。數(shù)值計(jì)算結(jié)果表明所得的兩個(gè)公式收斂迅速,一般只需取第一項(xiàng)或前兩項(xiàng)之和即可。探討了這些數(shù)值與空腔半徑等參數(shù)之間的關(guān)系。
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關(guān)鍵詞:
- 圓環(huán)天線; 導(dǎo)電媒質(zhì); 輸入阻抗; 輻射電阻
Abstract: A formula of input impedance of a circular loop antenna in spherical cavity surrounding by conductive medium is obtained. The definition of radiation performance of the antenna in conductive medium is given. The formula of radiation resistance of the antenna is derived. The results of numerical calculation show that the two formulas converge very fast, so it is feasibe to take the first term or the sum of first two terms only. The relationship between above mentioned characteristics and the parameters, such the radius of spherical cavity and others, is discussed. -
任朗,天線理論基礎(chǔ),人民郵電出版社,北京,1980, p.500, p.38.[2]W. R. Smythe, Static and Dynamic Electricity,McGraw-Hill Book Company, Inc., 1950, 273-274.[3]《數(shù)學(xué)手冊(cè)》編寫組,數(shù)學(xué)手冊(cè),人民教育出版社,北京,1979, pp. 627-640. -
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